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ADS58J63: Ground separation for ADS58J63

Part Number: ADS58J63

Hi,

I am using ADS58J63 in my design. I was planning to do ground separation for Analog and Digital signal lines. I checked the EVM schematic and there no such separation is done. I see in the device pin diagram there are separate AGND and DGND pins. Regarding this I had couple of queries.

1. Are these pins separate internally also so that I can use separate grounds?

2. Or are these AGND and DGND pins are internally connected to same ground and hence separating them externally won't have any effect?

Regards,

Kiran